Just to add to the tale of woe - since rejoining the RAF as a PTRS aviator in January I haven't been paid at all. Nothing, zip, nada, zilch.
I receive 2 x blank pay statements each month, although they appear to be arriving later and later and now appear approx 5 weeks after the pay date.
The worst aspect is that nobody is prepared to accept responsibility, I could get cross but with whom is the question. Even OC Admin at my unit seems no have no recourse but to ring the helpline whose advice is always - Contact your Unit HR staff. Yes they really did say that to OC Admin!